CVE-2022-20937A vulnerability in a feature that monitors RADIUS requests on Cisco Identity Services Engine (ISE) Software could allow an…
- 5.3MediumCVSS base score
- 0.99%Exploitation in 30 daysEPSS · top 37% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
A vulnerability in a feature that monitors RADIUS requests on Cisco Identity Services Engine (ISE) Software could allow an unauthenticated, remote attacker to negatively affect the performance of an affected device. This vulnerability is due to insufficient management of system resources. An attacker could exploit this vulnerability by taking actions that cause Cisco ISE Software to receive specific RADIUS traffic. A successful and sustained exploit of this vulnerability could allow the attacker to cause reduced performance of the affected device, resulting in significant delays to RADIUS authentications. There are workarounds that address this vulnerability.
Timeline
ID reserved
By cisco
- 12 months later
· 12 months later
Published
- 21 months later
· 21 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| ciscoCNA (assigner) | 3.1 | Medium5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |
| NVDNVD · Modified | 3.1 | Medium5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |
- EPSS (exploitation in 30 days)
- 0.99% · top 37% of all CVEs (14 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.3.
Affected products
Cisco · Cisco Identity Services Engine Software
- affected 2.6.0
- affected 2.6.0 p1
- affected 2.6.0 p2
- affected 2.6.0 p3
- affected 2.6.0 p5
- affected 2.6.0 p6
- affected 2.6.0 p7
- affected 2.6.0 p8
- affected 2.6.0 p9
- affected 2.6.0 p10
- affected 2.6.0 p11
- affected 2.6.0 p12
- affected 2.7.0
- affected 2.7.0 p1
- affected 2.7.0 p2
- affected 2.7.0 p3
- affected 2.7.0 p4
- affected 2.7.0 p5
- affected 2.7.0 p6
- affected 2.7.0 p7
- affected 3.0.0
- affected 3.0.0 p1
- affected 3.0.0 p2
- affected 3.0.0 p3
- affected 3.0.0 p4
- affected 3.0.0 p5
- affected 3.1.0
- affected 3.1.0 p1
What to do
Exploitation: The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory.
References
References1
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2022-26187 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2022-20937)Record last updated .